Motorola CT-39A ユーザーズマニュアル
7
FT-8800R Operating Manual
I
NSTALLATION
A
NTENNA
C
ONSIDERATIONS
For reference, the chart below shows approximate loss figures for typically-available co-
axial cables frequently used in VHF/UHF installations.
axial cables frequently used in VHF/UHF installations.
Loss in dB per 30 m (100 feet) for Selected 50-Ohm Coaxial Cables
(Assumes 50-ohm Input/Output Terminations)
C
ABLE
T
YPE
RG-58A
RG-58 Foam
RG-213
RG-8 Foam
Belden 9913
Times Microwave LMR-400
7/8” “Hardline”
L
OSS
: 144 MH
Z
6.5
4.7
3.0
2.0
1.5
1.5
0.7
4.7
3.0
2.0
1.5
1.5
0.7
L
OSS
: 430 MH
Z
> 10
8
5.9
3.7
2.9
2.6
1.3
3.7
2.9
2.6
1.3
Loss figures are approximate; consult cable manufacturers’ catalogs for
complete specifications.
In outdoor installations, be certain to weatherproof all connectors thoroughly, as water en-
tering a coaxial cable will cause losses to escalate rapidly, thus diminishing your communi-
cations effectiveness. The use of the shortest possible length of the highest quality coaxial
cable that fits within your budget will ensure the best performance from your FT-8800R.
tering a coaxial cable will cause losses to escalate rapidly, thus diminishing your communi-
cations effectiveness. The use of the shortest possible length of the highest quality coaxial
cable that fits within your budget will ensure the best performance from your FT-8800R.